“Informatics and Applications” scientific journal

Volume 3, Issue 1, 2009

Content   Abstract and Keywords   About Authors

METHODS FOR INFORMATION MODEL BUILDING FOR THE EARTH TIDAL HEREDITARY IRREGULAR ROTATION.

• I.N. Sinitsyn IPI RAN. sinitsin@dol.ru

Abstract:  Methods for information hereditary model building for the Earth tidal rotation fluctuations based on a priori and a posteriori data are considered. Linear and quasi-linear methods are developed. Equivalence of different hereditary disturbances is discussed. Experimental software is the part of the informational resources “Statistical dynamics of the Earth rotation.”

Keywords:  a priori and a posteriori data; informational model; informational resources; quasi-linear methods; spectral-correlational characteristics; hereditary fluctuations of the Earth rotation; hereditary kernel

PARALLEL COMPUTING IN LARGE-SCALEMULTIMODAL BIOMETRIC SYSTEMS

• O. S. Ushmaev   IPI RAN. oushmaev@ipiran

Abstract: The main topic is parallel computing in large-scale biometric identification systems. Approach of a biometric cluster throughput estimation, a cluster configuration estimation is proposed. Methods of organization of parallel computing for multimodal biometrics are developed.

Keywords: biometric identification; multimodal biometrics; parallel computing

DEVELOPMENT OF SUPERRESOLUTION-BASED FACE VIDEO ENHANCEMENT

• A. V. Nasonov   M. V. Lomonosov Moscow State University, Faculty of Computational Mathematics and Cybernetics. nasonov@cs.msu.ru
• A. S. Krylov   M. V. Lomonosov Moscow State University, Faculty of Computational Mathematics and Cybernetics. kryl@cs.msu.ru
• O. S. Ushmaev   IPI RAN. oushmaev@ipiran.ru

Abstract:  General superresolution-based method of face image enhancement for video data has been suggested. The superresolution is modeled as inverse problem to image downsampling, i.e., it finds an image that gives the minimal value of the quadratic discrepancy with initial low-resolution images after the motion dependent downsampling. High-quality superresolution method and fast superresolution methods are considered. Special deringing method for fast superresolution is proposed. New multiscale motion estimation method has been developed.

Keywords: superresolution; deringing; facial video sequence; multiscale motion estimation; fast superresolution

RECONSTRUCTION OF PROBABILISTIC CHARACTERISTICS OF RANDOM FUNCTIONS IN SPECT PROBLEMS

• V.G. Ushakov   Department of Mathematical Statistics, Faculty of Computational Mathematics and Cybernetics, M.V. Lomonosov Moscow State University; IPI RAN. vgushakov@mail.ru
• O. V. Shestakov   Department of Mathematical Statistics, Faculty of Computational Mathematics and Cybernetics, M.V. Lomonosov Moscow State University. oshestakov@cs.msu.su

Abstract:  The problem of reconstruction of probabilistic characteristics of an object which structure changes in a random manner during the process of projection data aquisition is considered. Within the frames of proposed tomography experiment model, a method to reconstruct distributions of a random function from distributions of projections in the case when random function has at most denumerable number of states is developed.

Keywords:  single-photon emission computer tomography (SPECT); stochastic tomography; exponential Radon transform; random functions; projection data

A DESIGN CONCEPT OF DOMESTIC INTEGRATED COMMUNICATIONMICROCONTROLLERS FOR PACKET SWITCHING

• V.B. Egorov   IPI RAN. vegorov@ipiran.ru

Abstract:  A concept of simplified integrated communication microcontrollers, which could be applied in various domestic packet switching and routing devices, with leveraging their functionality and facilitating development is suggested.

Keywords: integrated communication microcontroller; PowerQUICC; decentralized switching; routing switch

ON NONSTATIONARY QUEUEING SYSTEMS WITH CATASTROPHES

• A. I. Zeifman1   Vologda State Pedagogical University; IPI RAN; VSCC CEMI RAN. a_zeifman@mail.ru
• Ya.A. Satin   Vologda State Pedagogical University. yacovi@mail.ru
• A. V. Chegodaev   Vologda State Pedagogical University. cheg_al@mail.ru

Abstract: Nonstationary birth and death processes with catastrophes are considered. The bounds of the rate of convergence to the limit regime and the estimates of the limit probabilities are obtained. Also, the bounds for the mean of the process are studied and a queueing example is considered.

Keywords: nonstationary queues; Markovian models with catastrophes; weak ergodicity; bounds; limiting characteristics; approximations

BAYESIAN QUEUING AND RELIABILITY MODELS: AN EXPONENTIAL-ERLANG CASE.

• A.A. Kudriavtsev   Faculty of Computational Mathematics and Cybernetics, M. V. Lomonosov Moscow State University. nubigena@hotmail.com
• S. Ya. Shorgin   IPI RAN. sshorgin@ipiran.ru

Abstract:  The investigation of Bayesian queuing and reliability models is continued in the paper. The method provides the randomization of system characteristics with regard to a priori distributions of input parameters. This approach could be used to calculate average values of performance and reliability characteristics for the large groups of systems or devices. The new results are presented for a case of exponential and Erlang a priori distributions.

Keywords: Bayesian approach; queuing systems; reliability; mixed distributions; modeling; Erlang distribution; exponential distribution

ON ONE APPROACH TO IMAGE PRODUCTION WITHOUT SCREENS

• A. V. Torchigin   IPI RAN. torchigin_a@mail.ru

Abstract:  Properties of images observed in an oscillating mirror, where LEDs modulated by brightness are reflected, are considered. Possible areas of application of this approach are analyzed.

Keywords: image production; virtual environment; virtual reality; stereo images

CONVERGENCE RATE ESTIMATES OF DISTRIBUTIONS OF EXTREMA OF COMPOUND COX PROCESSES WITH NONZERO MEANS TO LOCATIONMIXTURES OF NORMAL LAWS

• S. V. Artyukhov   Faculty of Computational Mathematics and Cybernetics, M.V. Lomonosov Moscow State University. ArtyuhovSV@yandex.ru

Abstract:  Mathematical models of catastrophically accumulating effects related to nonhomogeneous chaotic flows of extremal events are considered, namely, extrema of compound doubly stochastic Poisson processes (compound Cox processes) with nonzero expectation. Convergence rate estimates are obtained in limit theorems for extrema of compound Cox processes. An example is given of existence of nontrivial limit of one-dimensional distributions of extrema of such processes with infinite variance under normalization which is traditional for sums with finite variance.

Keywords: extremum; compound doubly stochastic Poisson process; compound Cox process; location mixture of normal laws; convergence rate estimates